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Ludlum Measurements 177 - User Manual
47 pages
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LUDLUM MO
DEL
177
A
L
ARM RA
TEMETER
October
2018
Seria
l Number
322945
and Succe
eding
Seria
l Numbers
2
Table of Contents
Main Page
Default Chapter
6
Table of Contents
6
Introduction
8
Getting Started
9
Unpacking and Repacking
9
Preparing the Instrument for Use
9
Operating the Instrument
10
Specifications
11
Description of Controls and Functions
13
Front Panel
13
Back Panel
14
CAL Control
15
Internal Controls (Overhaul Only)
16
Safety Considerations
17
Environmental Conditions for Normal Use
17
Cleaning Instructions and Precautions
17
Warning Markings and Symbols
18
Electrical Safety Precautions
18
Calibration and Maintenance
20
Calibration
20
Establishing an Operating Point
21
Maintenance
22
Troubleshooting
23
Troubleshooting Electronics that Utilize a GM or Scintillation Detector
23
Troubleshooting GM Detectors
24
Troubleshooting Scintillators
25
Technical Theory of Operation
26
Amplifier
26
Discriminator
26
Digital Analog Conversion
26
Alarm
27
Reset
27
Audio
27
Time Constant
27
High Voltage (HV)
28
Low Voltage
28
Battery Charge
28
High Voltage Test
28
Alarm Set Voltage
28
Battery Test Voltage
29
Recycling
30
Parts List
31
Model 177 Alarm Ratemeter
31
Main Board, Drawing 347 × 496
31
Calibration Board, Drawing 347 × 132
34
Wiring Diagram, Drawing 347 × 492
35
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Ludlum Measurements 177 Specifications
General
Brand
Ludlum Measurements
Model
177
Category
Measuring Instruments
Language
English
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